Lock mechanism



Aug. 6, 1929. w. H. scHUERMAN LOCK MECHNISM 2 Sheets-Sheet l Filed June 3, 1927 y Mx \ INENTOR Schaar-man,

BYh/MAA, ATTORNEYS v WITNESSES Aug.` 6, 1929. w. H. scHUERMAN LOCK MECHANI SM Filed June 3, 1927 2 Sheets-Sheet lNvENToR cbuerrnan,

ATTORNEYS I I Il L /lll/llll/llulll i l Patent-eduv'g. 6,1929.A

winnen n. emmen,

PATENT y OFFICE OF NASHVILLE, TENNESSEE.

LOCK IECHANISI.

Application llled June 8,

This invention relates to improvements in locking vmechanisms generally, and more particularly to types of the same as are usually employed for securing doors of build- 6 ings, and apartments or roomsof buildings,

such as hotels and the like, against unauthorized or unlawful entry.

. In hotels, and other buildings given over to use bjtem orary occupants or transients, 10. it very often a pens that the electric lights are left on closed circuit upon the departure of a person from an apartment or room,'and ofttimes remain so for long periods of time and until the fact is discovered and thel circuit is broken by an attendant. This carelessness or thoughtlessness on the part of guests, servants and other` occupants of these classesof buildings is a constant source of wo and trouble to op rators ofthe same, and greatly adds to the`otherwise high cost .of upkee and maintenance thereof.V

It is, t erefore, the principal object of the present invention to provide for a locking mechanism in combination with a li htin'g i 2circuit controlling l or switching; i evice,

whereby, when anoccupant of a building, or`

an apartment or room of a building, as the case ma be, leaves thel remises without lhavin extinguished't e electric lights,

ao and c oses the door and locks the same, the

-lighting circuit is immediately, broken to exthe lights by theactuation of the t' 's lh-ciig mechanism to locked position.

A nother object of the invention is to provide for a mechanism of the charactermenti ned, wherein,'when the lock hasbeen 'rel/ased to its inoperative condition, the.' lightingircuit will be a in closed so that the person now entering t e building, apartment 40 or room will observe the lights-land then, ifv desired, operate lthe. Usual l'control switch to break thecircuit. and extinguish thesame.

A further object ofthe invention isto provide for a device as hereinbefore-characterized, and one wherein, when the occupant is withinthe buildin ,apartment or room, and actuates the loc 'ng mechanism to a locked condition, the-switching device assogo ciated, therewith will not beractuated, ybut will remain in its normally circuit closing l position, and the lights, if not already on,

im. semi m. leases.

'can be lighted by the closing of the circuit from the usual control switch.

With the foregoing and other equally important objects in view the invention resides in the certain new and useful combination, construction and arrangement of parts as will be hereinafter more fully described,

set forth in the appended claims, and illustrated in the accompanying drawings, in

Figure 1- is a fragmentary elevation of a door and door frame, and showing a practical application of the combined locking and circult controlling devices thereto,

Figure 2 is an enlarged vertical section through the locking and switching mechanisms and the cooperative control switch in f position on a door and door frame, showing the same in nomally inoperative positions,

Figure 3 is a fragmentary sectional view, but'otherwise lsimilar to that of Figure 2, showing the locking mechanism and the cooperative control switchI in their respective positions of operation, Y v

'gure 4-is a view similar to that of Figure 3,.'but showing the locking mechanism in its operative locked position, with the control switch in its normal or inoperative position, i

.,Figure- 5 is a vertical transverse section `on the line l5--5 of Figure 4, Fi re 6 is an enarged 'fragmentary sections. detail showing the arrangements of the switch contacts and the circuit connections as attached thereto, and

Figline 7 is a perspective view of the aux'iha bolt vactuating lever.

. Referring to the drawings, wherein )similar characters designa-te correspondin parts throughout the several views thereo a indic'ates a door and b its frame. Mounted on the door a, or mortised inwardly of its free vertical edge is a lock casing or housing 10 in which is mounted a slidin bolt 11 arranged for movements outwar ly and in Thebolt 1,1 is of any usual construction generally, but, in carrying out 'thevpresent invention, a circular bore 14 is drilled in'- wardly through the outer lend of the same and connects at its inner end with a slotway 15 cut inwardly of one side wall of the bolt 11, the'width of which slotway 15 is equal to the diameter of the bore 14 for a portion of its length vinwardly from theconnected end of the latter, but is narrower for the remainder of its length, substantially as shown. Mounted in this bore 14 and slotway 15 is an auxiliary bolt or rod 16, which has a forward portion corresponding to the circular formation of the bore 14, and a rear portion of va size corresponding to the form of the,narrower yportion ofthe slot- ,way 15, whereby the Asame is supported in to the bolt 11 at a point rearwardly of they extreme rear end 'ofthe slotway 15', and acts l,within the looped portion 18 ofthe actuat- 4on the door frame b for cooperation with to retain the bolt 16 in its rearmost position.

An actuating lever for the auxiliary bolt 16 comprising a lower open loop portion 18, and-an upwardly directed arm portion 18' projecting from one side of the portion 18, is mounted within the lock casing 10 Afor pivotal movements on a pivot rod 19 eX- tending between the opposite side walls of the latter. This pivot rod 19 passes through the opposite sides of the lower looped portion 18 of the actuating lever and medially of the opening therethrough. A longitudinally directed slotway 20 is formed in the arm portion 18 of the actuating lever adjacent its point of connection with the lower looped portion 18, and is engaged over a pin 21 projecting outwardly from one side of the sliding. bolt 11 of the lock. The upper end edge of Athearm portion 18 of the actuating lever is inwardly slotted as at 22, and cooperates with a pin 23 projecting outwardly through the slotway 15 from the side of the auxiliary bolt 16 for the purpose. Positloned within the lock casing 10 and j Supported on its lower wall is a member or bar 24, which extends between the key lioles formed inz opposite side walls of the `said casing, and has its forward end projected ing leverand slidably engaged on the pivot rod 19. A usual'ke'epeNplate 25 is-secured the sliding bolt ll-of-the lock casing, when thel 'parts are disposed in their operative positlons.

I Mounted within the door easing b behinq `theikeeper plate 25 is an electrical circuit outlet box or casing 26, in which is positioned a detent 27 having an outer headportion 28 disposed in alignment with the bolt opening of the keeper plate 25, and a guide `projection or stud 29 arranged atgits inner side and in engagement' with the open end of a guide memberA or socket 30 projecting inwardly of the inner or real` wall of the-outlet box or switch casing 26. A coil spring v31 is positioned within the bore of the guide socket 30, and has its outer end engaged over the guide stud 29 and bearing against the inner face of the'detent 27, so as to normally `tension the latter in its'outward position. An arm 32 projects from one side of the detent 27, and bears against an adjacent.

angular portion 33 ofa switch blade, 33, the latter having lits intermediate portion pivoted on a pivot member \34 projeetinfr between tlieopposite side walls of the box or casing 26. The opposite end ofthe switch blade 33 is arranged to be moved into and out of contacting engagement with a pair of circuit terminals. 35 and 36 to which the' circuit conductors 37 and 38 arel respectivei ly connected'.

In the operation of the locking and Y switching mechanisms as thus constructed and installed, and with the switch contactsC 35 and 36 electrically connected to the con-v ductors 37 and 38 of theelectric circuit `ward the inner wall of the lock casing 10.

As the member or'bar 24 moves inwardly, its forward end will engage the inner wall of the looped end 18 of the auxiliary bolt leverand move itinwardly to cause the slotted 'opening 22 in the upper end of lts arm portion 18 into engagement with the pin 23 projecting from the auxiliary bolt 16. Now, when thej key is turned inthe proper direction, they bolt .11 will be projected outwardly of the lock casing 10, and into engagement with the opening of the keeper plate 25. At thesame time, and as the bolt 11 moves to locked position, it will swing the lever 18 o'n its pivot 19, through `the medium of the slot 20 and pin 21 connection between the bolt 11 and the lever arm 18". .As the upper end of the lever arm 18 swings toward its forward position, the auxiliary bolt 16 will be projected outwardly ofthe forward end ofthe boltll, against' ,the tension of the'coiled spring 17, and its v free end will abut the head 28-of the detent 27 forcing the latter inwardly of the box or casing 25, and against the tension of the coiled spring 31. In the inward movement of the detent 27 its arm portion 32 willbe forcedagainst the angular portion 33 'of the switch blade 33 to swing the latter on its pivot 34 and withdraw its opposite endoutwardly from contact with 'the circuit terminals 35 and 36, thus opening the lighting circuit of which the conductors 37 and 38,- connectlng the contacts 35 and v36, are a part. When the ke Iis turned in the opposite direction, the ocking boltI 11 will'be withdrawn from engagement with the keeper 25 to normal position within the lck casing 14,0, and, in this movement, the lever 18 will be swung backwardly on its pivot `19, by the pin -21?'being engaged in the slot 20 in the arm portion 18', and return the auxiliary bolt 16 to its normal p0- sition inwardly ofthe locking bolt .11. In this return movement of the parts, the spring 17 will aid the lever 18 in such movement of the auxiliary bolt16; the spring 31 will act, at the same time, to return the detent to normal osition, and the s ring 34 will act to swlng the switch4 bla e 33 back into circuit closing contact with the terminals 35 and 36. Now, should the previous occupant ofthe apartment or room have left the lights turned onv when he or shelocked the door, asabove explained, the

lights will have been extinguished during the period in which the door was locked, and, with the unlocking ofthe door thereafter, the lights will again be lighted, when, if desired, the usual control switch will now be-actuated to o en the circuit to extinguish them. Now re ei'ring particularly to Figure 4, when it is desired to lock the door from the inside of the apartment or room, the key is'inserted into the inner key hole 13, when its inserted end will push against the member or bar24 and move the latter toward the outer side of the lock ,casing 10.

'In its outward movement, the forward end i of the member or bar 24 will push against the same direction, but the free end of the' l arm' portion 18 thereof will clear the pin the outer wall of the looped' portion 18 of the actuatingflever, andwill move the same so .that the slotted opening at the u per free end of the arm portion 18 lwill disengage from the pin 23 of the auxiliary bolt 16. Now, when the key is turned in the proper direction to move the locking bolt 11 loutwardly of the lockingr casing 10, and into locked engagement wlth the o ening of the keeper 25, the lever 18 will e swung in 22 so that the auxiliarybolt 16 remains in its inoperative position, and hence the ydevtent 27 and the switch blade 33 remain' undisturbed intheir normal positions of operation.

It will be understood that, while a mortise form of lock and a particular form of. control switch has been illustrated and described herein, the 'essential features of the present invention reside mainly in the use of themay be resorted to, without departing froml the spirit of the invention or its scope as claimed.

Having thus fully described` the invention, what is claimed is: j.

1. In combination with a door lock including a-key actuated rimary sliding bolt, Y

a secondary bolt slida l carried by said primary bolt, an 'electric circuit controll switch adapted to be actuated by said secondary bolt'after the primary boltis actu- .I

ated to locking position by the insertion and turning of the key in the lock from one side onlly ing sai secondary bolt to remain inoperative when the key is inserted intothe lock at the opposite side thereof.

2. In combination with a door lock including a key actuated primary sliding bolt, a secondary sliding bolt mounted for relative movement to and with said primary bolt,.an electric circuit control switch adapted to be actuated to an open circuit ositlon by said secondary bolt simultaneous y with the movement of the primary bolt to a locking position when the latter is actuated by the key from one side only of the lock, and

means for operatively connecting said secondary bolt to said primar bolt when the key is inserted into the loc from the side thereof aforesaid, said means being adapted to be actuated by the key to disconnect said secondary bolt from the primary7 bolt when the key is inserted into the lock from the opposite side thereof.

3. In combination, a door lock including a key actuated sliding primary bolt, a seconda bolt 4slidably mounted for movement in angrelatively to said primary bolt, a normally closed electric light switch, and a detent adapted to connect said bolts ,for simultaneous operation upon the insertion of the key inwardly of one side of the lock, said detent being moved to disconnected position upon the insertion of the key inwardly of the op site side of the lock so' that the primary olt only will be1moved to full.oper ative`position. i j

of the latter, and means for caus-C loo 4. In combination, a door lock including a the insertion of the key inwardly of one -key actuated sliding primary bolt, a sec- 'side of the lock, said detent being moved to onda'ry bolt slidably mounted for movement disconnected position upon the insertion of 10 on and relatively to said primary bolt a. northe key from the opposite side of the lock 5 mally closed electric light switch, and a latso that the primary bolt only will be moved erally movable detent adapted to connect to full o erative position. said bolts for simultaneous operation upon LIAM H. SCHUERMAN.` 

